History:

Saycha: This surnames spread was a mix of things. Forced moves, maybe from wars or political mess, scattered people with this name. Picture families moving, taking their name to new places. People also moved willingly—better jobs or land pulled them to new areas. Over time, these movements shaped where this surname is found. Where people settled, based on things like resources and existing towns, also mattered. The story of this surname shows how people moving around affects family names.

Description:

However, I can guess at some possibilities based on how names often change. We might see it as Sayche (a simple spelling tweak), Saytcha (adding a t—a common sound change), or Saicha (a small vowel shift). These are just educated guesses though.